61356355530 has 64 divisors (see below), whose sum is σ = 155553661440. Its totient is φ = 15445740096.

The previous prime is 61356355519. The next prime is 61356355547. The reversal of 61356355530 is 3555365316.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28872 + ... + 351491.

It is an arithmetic number, because the mean of its divisors is an integer number (2430525960).

Almost surely, 2^61356355530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61356355530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77776830720).

61356355530 is an abundant number, since it is smaller than the sum of its proper divisors (94197305910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61356355530 is a wasteful number, since it uses less digits than its factorization.

61356355530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380675.

The product of its (nonzero) digits is 607500, while the sum is 42.

The spelling of 61356355530 in words is "sixty-one billion, three hundred fifty-six million, three hundred fifty-five thousand, five hundred thirty".